<template>
  <div class="photolist">
    <div id="slider" class="mui-slider">
      <div
        id="sliderSegmentedControl"
        class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted"
      >
        <div class="mui-scroll">
          <a :class="['mui-control-item',item.id == 0 ? 'mui-active' : '']" v-for="item in cates" :key="item.id" @tap="getPhotoListByCateId(item.id)">{{item.title}}</a>
        </div>
      </div>
    </div>
    <!-- 图片区域 懒加载 -->
    <ul class="photo-list">
      <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/'+item.id" tag="li">
        <img v-lazy="item.img_url" />
        <div class="info">
          <h1 class="info-title">{{item.title}}</h1>
          <div class="info-body">{{item.zhaiyao}}</div>
        </div>
      </router-link>
    </ul>
  </div>
</template>
<script>
import mui from "../../lib/mui/js/mui.min.js"; //导入mui的js文件

export default {
  data() {
    return {
      cates: [], //所有分类的数据
      list:[]//图片列表的数据
    };
  },
  created() {
    this.getAllCategory();
    this.getPhotoListByCateId();
  },
  mounted() {
    //当组件中的dom结构被渲染好并放到页面中后，会执行这个钩子函数
    mui(".mui-scroll-wrapper").scroll({
      deceleration: 0.0005 //flick减速系数，系数越大，古代弄越慢，默认值0.0006
    });
  },
  methods: {
    getAllCategory() {
      //获取所有的图片分类
      this.$http.get("./json/imgcategory.json").then(result => {
        if (result.body.status === 0) {
          result.body.message.unshift({ title: "全部", id: 0 }); //手动拼接处完整的图片分类
          this.cates = result.body.message;
        }
      });
    },
    getPhotoListByCateId(){
      //获取所有图片信息
      this.$http.get("./json/imglist.json").then(result => {
        if (result.body.status === 0) {
          this.list = result.body.message;
        }
      });
    }
  }
};
</script>
<style lang="less" scoped>
* {
  touch-action: pan-y; /*消除警告*/
}
.photo-list{
  margin:0;
  padding:10px;
  padding-bottom:0;
  li{
    list-style: none;
    background:#ccc;
    text-align: center;
    margin-bottom:10px;
    position: relative;
    box-shadow: 0 0 6px #999;
    img[lazy="loading"]{
      width:40px;
      height:300px;
      margin:auto;
    }
    img[lazy="loaded"]{
      width:100%;
      vertical-align: middle;
    }
    .info{
      color:#fff;
      text-align: left;
      position: absolute;
      bottom:0;
      background-color: rgba(0, 0, 0, 0.4);
      width:100%;
      max-height: 84px;
      .info-title{
        font-size:14px;
      }
      .info-body{
        font-size:12px;
      }
    }
  }
}

</style>